(1. 东北大学 材料与冶金学院, 沈阳 110006;
2. 吉林大学 超硬材料国家重点实验室, 长春 130023)
摘 要: 对AlSi合金在3.6~5.5 GPa高压下凝固形成的组织与常压凝固组织进行了对比,对高压下的胞枝晶转变进行了分析。 发现高压对合金固溶度和扩散系数的影响是引起高压凝固组织变化的主要原因。
关键字: 高压凝固; AlSi合金; 胞枝晶转变; 凝固界面
(1. College of Materials and Metallurgy, Northeastern University, Shenyang 110006, P.R.China;
2. State Key Laboratory of Superhard Materials, Jilin University, Changchun 130023, P.R.China)
Abstract:The structure of AlSi alloy solidified at 3.3~5.5 GPa pressure was compared with that at normal pressure, and the mechanism of the change from cellular crystal to dendritic crystal was studied. The results show that the changes of solid solubility and diffusioncoefficient at high pressure are the main cause of structure changes.
Key words: high pressure solidification; AlSi alloys; cellulardendritic transition; solidification interface